The Sigma EX 50-500mm f/4-6.3 APO DG is a high zoom ratio lens optimised for
digital SLR cameras and capable of covering a wide range of focal lengths from
50mm standard to 500mm ultra telephoto. Using four pieces of SLD (special low
dispersion) glass, it is able to achieve excellent correction of colour
aberration throughout the entire zoom range. The HSM models (only available for
AF Canon, Nikon, Four Thirds and Sigma Mounts) provide quiet high-speed AF
function, as well as full time manual focus capability.
This lens also features a Zoom Lock device to eliminate �ezoom creep�f when the
lens is tilted down. When the lens is set to the 50mm focal length, it is
remarkably compact and provides easy handling. The tripod mount is composed of
magnesium, to minimise Show More

The Sigma EX 50-500mm f/4-6.3 APO DG is a high zoom ratio lens optimised for
digital SLR cameras and capable of covering a wide range of focal lengths from
50mm standard to 500mm ultra telephoto. Using four pieces of SLD (special low
dispersion) glass, it is able to achieve excellent correction of colour
aberration throughout the entire zoom range. The HSM models (only available for
AF Canon, Nikon, Four Thirds and Sigma Mounts) provide quiet high-speed AF
function, as well as full time manual focus capability.
This lens also features a Zoom Lock device to eliminate �ezoom creep�f when the
lens is tilted down. When the lens is set to the 50mm focal length, it is
remarkably compact and provides easy handling. The tripod mount is composed of
magnesium, to minimise total weight and also it is easy to grip and carry the
lens due to ergonomic design of the tripod mount.
Non-rotating front lens elements, due to rear focus mechanism make possible the
use of a custom bayonet �ePetal-type Hood�f, which prevents extraneous light from
degrading the image quality. This mechanism also allows the use of a circular
polarising filters, since the front barrel does not rotate during focusing or
zooming.
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